The DP-850 fully complies with AAPM TG-66 requirements for CT simulators as well as key components of AAPM TG-53 for treatment planning system quality assurance. It is constructed of a solid material with a relative density value of 0.85 (relative to water) as the background material. It consists of 4 primary modules that are assembled using rods of a density similar to trabecular bone around the periphery of the DP-850. To optimise functionality it contains various internal structures, test objects, fiducials and external alignment etchings.
CT SIMULATOR QA (AAPMTG-66)
-
Alignment & Orientation of Gantry Lasers to Center of Imaging Plane
-
Lateral Wall Laser Spacing to Lateral Gantry Lasers & Scan Plane
-
Orientation of Wall Lasers to Imaging Plane
-
Orientation of Ceiling Laser to Imaging Plane
-
Orientation of CT-Scanner Couch to Imaging Plane
-
Couch Vertical and Longitudinal Motion
-
Couch Indexing and Position
-
Gantry Tilt Accuracy
-
Gantry Tilt Position Accuracy
-
Scan Localisation
-
Radiation Profile Width
-
Sensitivity Profile Width
-
CT Number Constancy
-
Image Noise
-
In plane spatial integrity
-
Field uniformity
-
Spatial resolution
-
Contrast resolution
VIRTUAL SIMULATION TESTS
-
Hidden target localization accuracy
-
Contouring accuracy
-
Laser movement accuracy
TREATMENT PLANNING SYSTEM
-
Deformable Registration
-
DICOM transfer accuracy
-
Image quality verification (Resolution, CT number Constancy/Linearity, Uniformity)
-
Spatial integrity
-
Volume calculation accuracy
-
Margin creation accuracy
-
DRR spatial accuracy
-
DVH Accuracy
-
Dose Accuracy
TREATMENT IMAGING SYSTEM (kV, MV, & CBCT)
-
DICOM transfer accuracy
-
Volume transfer accuracy
-
Spatial integrity accuracy
-
TG -142 position/re-position test
-
TG -142 monthly
TREATMENT DELIVERY SYSTEM
-
Plan delivery accuracy (dose) for heterogeneous target and critical structures (Chamber, OSL, & Film Measurements)
-
Single chamber IMRT QA dose measurement
-
Target localisation delivery accuracy